面向信息系统的生存性恢复机制  

A Recovery Mechanism of Survivability for Information System

作　　者：夏秦[1] 王志文[1] 邹华峰[1] 冯博琴[1] 

机构地区：[1]西安交通大学电子与信息工程学院,西安710049

出　　处：《西安交通大学学报》2010年第4期18-22,共5页Journal of Xi'an Jiaotong University

基　　金：国家自然科学基金资助项目(60970121);国家科技人员服务企业行动计划资助项目(2009GJG00025);西安交通大学科研基金

摘　　要：为了克服现有信息系统生存性恢复手段单一、执行顺序固化以及恢复过程缓慢等不足,提出了一种以功能部件作为基本修复单位的生存性恢复机制.该机制根据关键功能部件的失效程度将信息系统提供的服务区分成完整服务、可接受服务以及中断服务3种类型,并以功能部件的可用性定义服务和信息系统的生存性.根据失效功能部件对服务的影响程度将恢复过程分为2个阶段,先通过修复关键功能部件恢复中断服务,然后再通过修复非关键功能部件完善可接受服务.应用新的恢复机制对一个网络教学系统进行生存性恢复实验,结果表明该机制能够依据信息系统的生存性态势确定恢复行为和执行顺序,与串行恢复机制相比,恢复行为的执行次数由9减少到3.A recovery mechanism of survivability with components being basic fixed units is presented for information systems to overcome the deficiencies appeared in existing approaches on survivability recovery, such as undiversified method, solidified executing sequence and delayed recovery process. Services provided by a information system are classified into complete services, acceptable services and interrupted services according to the disabled extent of critical components, and the survivability models of services and the information system are built separately with availability of components. According to the affecting degree of disabled components on services, the recovery procedure is divided into two phases, recovering interrupted services by repairing critical components and improving acceptable services by repairing non-critical components. A survivability recovery experiment in a network teaching system shows that the proposed mechanism can determine the recovering actions and executing sequences depending on the survivability state of information systems. A comparison with the mechanism using serial recovery actions shows that the number of actions performed by the proposed mechanism is reduced from 9 to 3.

关 键 词：信息系统 生存性 恢复 服务 

分 类 号：TP393[自动化与计算机技术—计算机应用技术]